I have a 2000 Honda trx350fm 4x4, neutral light works but comes on in different spots, reverse, neutral and first gear. Sometimes flickers between making it hard to turn on to start. Wondering if or how I can test the shift assembly switch in the rear of the motor before taking it all apart. Now reverse light is eradic ? Seen it can also be the rod that comes from the shift drum! If that's broke motor needs to be tore down. Any help to diagnose before disassembling would be appreciated.